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https://issues.apache.org/jira/browse/DRILL-3232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14981843#comment-14981843
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ASF GitHub Bot commented on DRILL-3232:
---------------------------------------

Github user jacques-n commented on a diff in the pull request:

    https://github.com/apache/drill/pull/207#discussion_r43470824
  
    --- Diff: 
exec/java-exec/src/main/codegen/templates/AbstractFieldReader.java ---
    @@ -57,9 +61,9 @@ public void copyAsValue(MapWriter writer){
       public void copyAsField(String name, MapWriter writer){
         fail("CopyAsField MapWriter");
       }
    -  public void copyAsValue(ListWriter writer){
    -    fail("CopyAsValueList");
    -  }
    +//  public void copyAsValue(ListWriter writer){
    --- End diff --
    
    delete?


> Modify existing vectors to allow type promotion
> -----------------------------------------------
>
>                 Key: DRILL-3232
>                 URL: https://issues.apache.org/jira/browse/DRILL-3232
>             Project: Apache Drill
>          Issue Type: Sub-task
>          Components: Execution - Codegen, Execution - Data Types, Execution - 
> Relational Operators, Functions - Drill
>            Reporter: Steven Phillips
>            Assignee: Hanifi Gunes
>             Fix For: 1.3.0
>
>
> Support the ability for existing vectors to be promoted similar to supported 
> implicit casting rules.
> For example:
> INT > DOUBLE > STRING > EMBEDDED



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